Manufacturer and builder 5, 1869
In one of the last mettings of the chemical society in Berlin, Prussia, Messrs. Graebe and Liebermann announced that they had succeeded in producing one of the coloring principles of madder, namely, alizarine; they claim to have obtained it artificially from anthracene. This latter substance is a solid hydrocarbon, much resembling naphthaline, but less volatile, yielding a vapor of the specific gravity of 6.78. It is a constant product in the manufacture of illuminating gas. The discoverers of the process exhibited the crystallized artificial product, as well as fabrics dyed and printed with the same.